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Finding the Fourth Proportional to 199.51, 275.26 and 115.46

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Solution

The fourth proportional to 199.51, 275.26 and 115.46 is: 159.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.51 : 275.26 = 115.46 : x
  2. Step 2: Convert to fraction form
    199.51/275.26 = 115.46/x
  3. Step 3: Cross multiply
    199.51x = 275.26 × 115.46
  4. Step 4: Simplify right side
    199.51x = 31,781.52
  5. Step 5: Solve for x
    x = 31,781.52/199.51
  6. Step 6: Final answer
    x = 159.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.